Passkeys are FIDO credentials tied to a specific app or website that let you sign in with the same method you use to unlock your device, be that biometrics or a PIN.
As long as you can remember your phone password, you can log in to your accounts.
So... What if your phone is stolen or if you wanted to share a login with your partner?
How do passkeys work then?
And if a very simple pin or phone password is all it takes to gain access to your stuff, isn't it less secure?